If I may ad my 2 cents to this discussion, most if not all of my WILDs that resulted in an LD were after an artificial awakening (alarm), so far if I wake up naturally I can lay still for a long time till I eventually fall asleep or stay up till morning so I stop my WILD-attempts then in favor of having a decent rest.
I also notice being woken up by alarm makes me feel more tired than when I wake up naturally.